POLYVINYL CHLORIDE CONTAINING MULTIARMED STAR COPOLYMERS
The invention concerns processes for the production of multiarmed star copolymers comprising polymerizing vinyl chloride with a multifunctional initiator in the presence of Na 2 S 2 O 4 and water. The invention also concerns polymers made from the processes and articles made from the polymers.
1 . A process for the production of a multiarmed star copolymer comprising polymerizing vinyl chloride with a multifunctional initiator in the presence of Na 2 S 2 O 4 and water.
2 . The process of claim 1 , where the multifunctional initiator is a bifunctional or tetrafunctional initiator.
3 . The process of claim 1 , wherein the multifunctional initiator is 1,2-bis(iodopropionyloxy)ethane, dimethyl 2,5-diiodohexanedioate, bis(2-methoxyethyl)-2,5-diiodohexanedioate, pentaerythritol tetrakis(2-iodopropionate), or [PBA-CH(CH 3 )—COO—CH 2 ] 4 C where PBA is iodo terminated poly(n-butyl acrylate).
4 . The process of claim 1 , wherein the molar ratio of Na 2 S 2 O 4 to multifunctional initiator is 2:1 to 100:1.
5 . The process of claim 1 , wherein the molar ratio of vinyl chloride to multifunctional initiator is 500 to 10,000.
6 . The process of claim 1 , wherein said contacting is performed at a temperature of 20 to 60° C.
7 . The process of claim 1 , wherein each arm of said multiarmed star copolymer has a molecular weight (Mn) of 200 to 35,000.
8 . The process of claim 1 , wherein said multiarmed star copolymer comprises [PVC-b-PBA-CH(CH 3 )—COO—CH 2 ] 4 C where PVC is polyvinyl chloride and PBA is poly(n-butyl acrylate).
9 . A compound of the formula [PBA-CH(CH 3 )—COO—CH 2 ] 4 C where PBA is iodo terminated poly(n-butyl acrylate).
10 . A compound of the formula [PVC-b-PBA-CH(CH 3 )—COO—CH 2 ] 4 C where PVC is polyvinyl chloride and PBA is poly(n-butyl acrylate).
11 . An article containing a polymer produced by the process of claim 1 .
12 . The article of claim 11 , wherein said article is substantially free of plasticizer.
13 . The article of claim 12 , wherein said article is substantially free of phthalates.
14 . A multiarmed star copolymer comprising polyvinyl chloride.
15 . The multiarmed star copolymer of claim 14 , wherein each arm of said multiarmed star copolymer has a molecular weight (Mn) of 200 to 35,000.
16 . A process for making an article comprising polyvinyl chloride comprising forming said article from a multiarmed star copolymer comprising polyvinyl chloride made by the process of claim 1 , said performing occurring substantially in the absence of a plasticizer.
17 . The process of claim 16 , wherein said multiarmed star copolymer comprising polymerizing vinyl chloride with a multifunctional initiator in the presence of Na 2 S 2 O 4 and water.
18 . The process of claim 16 , wherein said multifunctional initiator is 1,2-bis(iodopropionyloxy)ethane, dimethyl 2,5-diiodohexanedioate, bis(2-methoxyethyl)-2,5-diiodohexanedioate, pentaerythritol tetrakis(2-iodopropionate), or [PBA-CH(CH 3 )—COO—CH 2 ] 4 C where PBA is iodo terminated poly(n-butyl acrylate).
19 . The process of claim 16 , wherein the molar ratio of Na 2 S 2 O 4 to multifunctional initiator is 2:1 to 100:1, the molar ratio of vinyl chloride to multifunctional initiator is 500 to 10,000, and the contacting is performed at a temperature of 20 to 60° C.
20 . The process of claim 16 , wherein each arm of said multiarmed star copolymer has a molecular weight (Mn) of 200 to 35,000